Molecular phylogenetics of Neotropical Cyanaeorchis (Cymbidieae, Epidendroideae, Orchidaceae): geographical rather than morphological similarities plus a new species
Molecular phylogenetics of Neotropical Cyanaeorchis (Cymbidieae, Epidendroideae, Orchidaceae): geographical rather than morphological similarities plus a new species
复制标题
DOI：
10.11646/phytotaxa.156.5.1
复制
发表时间：
2014-01-28
期刊：
影响因子：
1.1
通讯作者：
Salazar, Gerardo A.
中科院分区：
文献类型：
--
作者：
Batista, Joao A. N.;Mota, Ana Carolina M.;Salazar, Gerardo A.
我们调查了系统发育的Cyanaeetris和选择的部落Cymbidieae的核（ITS）和质体（matK-trnK和rbcL）DNA序列的基础上的代表。贝叶斯和简约分析的单独和合并的数据集在很大程度上是一致的，并表明，新热带区Cyanaeastris不属于主要的旧大陆亚族Eulophiinae，在那里它以前被放置。相反，它在Catasetinae中被强烈支持为Grobya的姐妹。由于Catasetinae是新热带区，并没有明确的形态相似性之间的Cyanaeelis和其他属的亚族，这种关系反映了地理，而不是形态的相似性，并建议栖息地驱动的地方多样化。来自巴西中部的标本，以前被鉴定为Cyanaeetris minor，现在被证明是一个不同的物种，在这里被描述为C。praetermissa。生态位模型表明，C。praetermissa和C. minor具有不同的分布和生态位，而第三种C.芦竹的气候耐受性较广，其分布范围包括其他两个物种。该属的分布还预计包括玻利维亚、里约热内卢州、圣埃斯皮里托和巴西东北部的几个地区，目前还没有发现。
We investigated the phylogenetic placement of Cyanaeorchis and selected representatives of the tribe Cymbidieae based on nuclear (ITS) and plastid (matK-trnK and rbcL) DNA sequences. Bayesian and parsimony analyses of separate and combined datasets were largely congruent with each other and showed that the Neotropical Cyanaeorchis does not belongs in the predominantly Old World subtribe Eulophiinae, where it has previously been placed. Instead, it is strongly supported as a sister to Grobya in Catasetinae. Because Catasetinae are Neotropical and there are no unequivocal morphological similarities between Cyanaeorchis and other genera in the subtribe, this relationship reflects a geographical rather than morphological similarity and suggest habitat-driven local diversification. Specimens from central Brazil formerly identified as Cyanaeorchis minor are shown to be a distinct species, described here as C. praetermissa. Niche modeling indicates that C. praetermissa and C. minor have different distributions and ecological niches, whereas a third species, C. arundinae has broader climatic tolerances and a distribution that encompasses those of the other two species. The distribution of the genus is also predicted to include Bolivia, the states of Rio de Janeiro, Espirito Santo and several areas in northeastern Brazil, from where no collections are currently known.